Optimization of processing conditions and characterization investigations of ceramic injection molded and sintered ZrO2/WC composites

UENAL N., KERN F., Oevecoglu M. L., GADOW R.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.509, sa.14, ss.4797-4804, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 509 Sayı: 14
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jallcom.2011.01.167
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4797-4804
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In this investigation, 3 mol% Y2O3 stabilized ZrO2-based composites reinforced with 10 vol.%, 20 vol.% and 40 vol.% WC (named as 3Y-TZP/10WC, 3Y-TZP/20WC and 3Y-TZP/40WC) were fabricated by using injection molding and sintering. Mechanical properties of these composites varied due to WC addition and dwelling time. Density, strength and toughness decreased with shorter dwelling time and increasing WC content however a significant enhancement in fracture toughness was obtained by 3Y-TZP/20WC composite which had 9.2MPam(1/2) toughness. Severe unlubricated wear tests which were performed under 55N normal load and 45km sliding distance showed that 3Y-TZP/20WC composite had the lowest wear rate and wear volume values which are 2x10(-8)mm(3)/(Nm(-1)) and 0.05mm(3), respectively. (C) 2011 Elsevier B.V. All rights reserved.